User Guide

13
Note: in the following measurement
sections, a generic "P– –" will be placed
on the secondary LCD instead of the exact
related message (e.g. "P1" for Ammonia
LR).
• Before performing a test read carefully all the instructions related
to the selected parameter.
For the program number, see the table on page 11 or look at the list
printed on the mask of the meter.
°C°C
°C°C
°C: degree Celsius
°F°F
°F°F
°F: degree Fahrenheit
HRHR
HRHR
HR: High Range
kg/hakg/ha
kg/hakg/ha
kg/ha: kilograms per hectare
LCDLCD
LCDLCD
LCD: Liquid Crystal Display
LRLR
LRLR
LR: Low Range
L/haL/ha
L/haL/ha
L/ha: liters per hectare
mm/hamm/ha
mm/hamm/ha
mm/ha: millimeters per hectare
mg/Lmg/L
mg/Lmg/L
mg/L: milligrams per liter (ppm)
mLmL
mLmL
mL: milliliter
MRMR
MRMR
MR: Medium Range
UHRUHR
UHRUHR
UHR: Ultra High Range
ABBREVIATIONS
48
• Press ZERO and “SIP” will appear on the display.
• Wait for a few seconds and the display will
show “-0.0-”. Now the meter is zeroed
and ready for measurement.
• Remove the cuvet and add
the content of one packet
of HI 93750B reagent. Re-
place the cap and mix
gently for one minute by
turning slowly the cuvet up-
side down.
• Reinsert the cuvet into the instrument.
• Press TIMER and the display will show the countdown prior to the
measurement or, alternatively, wait for 2 minutes and press READ
DIRECT. In both cases “SIP” will blink during measurement.
• The instrument directly displays concentration in mg/L of potassium
(K) on the Liquid Crystal Display.
• To convert the reading to mg/L of potassium oxide (K
2
O), multiply
by a factor of 1.20.
INTERFERENCES
The following ions do not interfere below the concentrations reported:
Ammonium 10 ppm
Calcium 10000 ppm as CaCO
3
Chloride 12000 ppm
Magnesium 8000 ppm as CaCO
3
Sodium 8000 ppm
Potassium MR